Transformer.



UNITED STATES PATENT. OFFICE.

TRANSFORIVIER.

Specfioaton of Letters Patent.

Patented Nov. 6, 1906.

. Application filed January 17, 1905. Serial No. 241.441.

T all whom it maty con/087%:

, Be it known that I, HERMANN HEINIOKE, a

lsubject of the German Emperor, residing at Steglitz, near Berlin; in the Kingdom of Prussia, Germany, have invented certain new and useful, Improvements in Transformers, of which the following is a specification.

The subject of my invention is a transformer for high-tension electric currents for producing electric Waves especially suitedfor Wireless telegraphy,

but also applicable for therapeutic and other purposes.

, The. new transformer consists, essentially, of a well-insulated 'metallic core, which may Abe either solid or hollow, and of a coil of Wire wound .round the said core and having its extremities connected to the layers of a condenser.

To employ the transformer, the electric vWaves produced by any suitable source of high-tension electric currents, such as an induction-coil .or an infiuence-.machine, are allowed to pass to the metallic core with or without a charging spark-gap, while the one end of the coilsurrounding the corethat is to say, one layer of the condenser-is connected With devices such as are used as eleci trodes in Wireless telegraphy or for therapeutic or other purposes.

That it is a factthat induction-currents are actually produced in the coil can be very properties of the electric Waves which the core produces.

In the application of the transformer to f may be employed, in which event it proves adwireless telegraphy experiments show' that as compared With Ithe Well-known systems of Mareoni and Braun extremely pure Waves are produced at the antenna and great economy of enervy effected.

In order that the most favorable conditions may be attained for various distances-that is to say, in order that the length of the Waves may be varied-the metallic core is arranged to slide in axial direction on the core.

In the accompanying drawings my invention is illustrated in its application a's'transformer for wireless-telegraphy.

Figure 1 is adiagram showing the appara- "tus constructed with only one metallic core. Fig. 2 is a like view of an apparatushaving two cores. Fig. 3 is a'vertical sectional view lillustrating the employment of the in conjunction With a parabolie re ector or casin".

Referring more particularly to Fig. 1, the transformer. consists of the insulated metallic cylinder b and coil c, connected directly With the condenser d. The transformer is connected '(a charging spark-gap being left between the two) with onev pole of the secondary circuit of an induction-coil a, which is shown Without battery, the other pole-of which is grounded. To the one end of the coil c-.that is to say, to one of the layers of dispensed With.

In Fig. 2 two scribe'd are shown. .ary circuit of the induction-coil a is connecttransformers of the kind (lerespectively, While between the one end of the coil c' and the one end of the coil cz-that is to say, between one layer of the condenser d' and one layer of the condenser (ZZ- a resistance-for instance7 a sparkinr distancefis provided. At this gap one 'pole is connected With an antenna g and the otherpole With the earth-plate E. Instead of the spark-gap another resistancefor instance, .a coilvantageousto provide 'a charging spark-gap between'one of the two transformers and the induction-coil.

The above-described transformer can also be employed for directed ,telegraphy Without wires by fixing it at a suitable' height above the ground and connecting it With a source of electricityin the n^. anner set forth. The radiat'ion of the electric Waves is eifected by a Wire structure of any suitable nature, such Each pole of the secondvss aipparatus g the condenser d-is connected a resistancetransformer and the induction-coil may be ed with an insulated inetallic cylinder b' bg,

as a network,,a brush, a coil, or the like. The transformer and the Wire structure which radiates the Waves may With advantage be inclosed in a nietallic parabolic hollow casing or reflector, which may be constructed of p wire-netting or'perforated sheet metal.

Fig. 3 illustrates such` an arrangement. h

4is a column supportin'g an insulating structure i, .in one portion of which the metallic cylinder b 'is located Within the casing lc. The Wire coil c is wound round the insulatingchamber containingthe core or cylinder b, and its ends are connected nith the two layers of the' condenser d. ,T he one layer of the lattery is connected With the Wire radiating structure m by a Wire Z. From the termina] screwnv at the-'head of the column h a Wire o leads Nto the induction-coila, so that the Waves excited by the latter' ass across the charging spark-gap p below t e cylinder b and agitate the vibratory system contained Within the casingk', thus causing it to vibrate likewise.

In employing the transfornier in electrotherapeutics an electrode with flexible cordwould beattached to the one end of the coil. For such purposes the arrangement shown in Fig. 2 may be advantageously used, there being then twolelectrodes at disposal.

Having thus descr'ibedv my invention, I claim as new and desire to secure by Letters Patent- 1. A transfornierfor high-tension electric currents for the production of electric Waves for Wireless telegraphy, therapeutic and other purposes comprising an insulated metall'ic core, a coil Wound round the latter, a source of electricity in connection with the core; and a condenser: connected directly with the ends of the coil,'substantially as described.

2. A transfornrer for high-tension electric currents for the production of electric waves for -wireless telegraphy, therapeutic andI other purposes coinprising an msula'ted'metallic core, a coil 'wound round the latter and sliding thereon in axial direction, a source of pole connected With one of the cores, and condensers connected directly With the ends of each of the coils, substantially as described.

4. A transformer for high-tension electric= currents for the production of electric Waves for Wireless telegraphy comprising twoinsulated metallic cores,-a coil wound round each of the latter, an antenna connected with .the one end of each coil, a source of electricity having each pole connected With one of the cores, and condensers connected directly with the'A .ends of each of the coi'ls, substantially as described.,

6. A transformer for high-tension electric currents for the 'production of electric Waves for wireless telegraphy 'comprising two insulated metallic cores, a coil wound round each of the latter, a grounded resistance running from the one end' of each coil, an antenna connected With the said resistance, a source of electricity, having each pole connected With one of t e. cores, and condensers connected directly with the ends of each of the coils, substantially as describe'd.V

7. A transformer for Ahigh-tension electric currents forthe production of electric Waves for wireless telegraphy compris'ing two insulated metallic cores, 'a coil wound round each of the latter, an earth connection, in which a s ark-gap is interposed` between the two -coi s, running from the one end of each coil,

an antenna connected with the said earth connection on the opposite side of the gap to that on which the earth contact is located, a

source' of electricity having each pole con- `,nected with one of the cores, and condensers IOO connected directly With the ends of each of the coils, substantially asdescribed.

In testimony whereof I have hereunto signed my name in -the presence of two sub-- scribing witnesses. i

` HERMANN HEINICKE. Witnessesz' 4 HENRY HASPER, WOLDEMAR HAUP'r. 

